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首页> 外文期刊>Gait & posture >An empirical examination of detrended fluctuation analysis for gait data.
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An empirical examination of detrended fluctuation analysis for gait data.

机译:对步态数据进行去趋势波动分析的实证检验。

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摘要

Stride interval series exhibit statistical persistence, and detrended fluctuation analysis (DFA) is a routinely employed technique for describing this behavior. However, the implementation of DFA to gait data varies considerably between studies. We empirically examine two practical aspects of DFA which significantly affect the analysis outcome: the box size range and the stride interval series length. We conduct an analysis of their effect using stride intervals from 16 able-bodied adults, for overground walking, treadmill walking while holding a handrail, and treadmill walking without using a handrail. Our goal is to provide general guidelines for these two choices, with the aim of standardizing the application of DFA and facilitating inter-study comparisons. Based on the results of our analysis, we propose the use of box sizes from 16 to N/9, where N is the number of stride intervals. Moreover, for differentiating between normal and pathological walking with reasonable accuracy, we recommend a minimum of 600 stride intervals.
机译:步幅间隔序列具有统计持久性,去趋势波动分析(DFA)是描述此行为的常规技术。但是,在研究之间使用DFA进行步态数据的实施差异很大。我们根据经验检查了DFA的两个实际方面,这些方面会显着影响分析结果:盒子大小范围和步幅间隔系列长度。我们使用来自16个身体健全的成年人的步幅进行了效果分析,包括地面行走,握住扶手的跑步机行走以及不使用扶手的跑步机行走。我们的目标是为这两种选择提供通用指导,以标准化DFA的应用并促进研究之间的比较。根据我们的分析结果,我们建议使用框大小从16到N / 9的框,其中N是步幅的数量。此外,为了以合理的准确度区分正常行走和病理行走,我们建议最小步幅为600。

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